141 lines
3.4 KiB
Go
141 lines
3.4 KiB
Go
package provider
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import (
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"fmt"
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"strings"
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"github.com/qdm12/gluetun/internal/constants"
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"github.com/qdm12/gluetun/internal/models"
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"github.com/qdm12/golibs/network"
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)
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type surfshark struct {
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servers []models.SurfsharkServer
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}
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func newSurfshark(servers []models.SurfsharkServer) *surfshark {
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return &surfshark{
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servers: servers,
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}
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}
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func (s *surfshark) filterServers(region string) (servers []models.SurfsharkServer) {
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if len(region) == 0 {
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return s.servers
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}
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for _, server := range s.servers {
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if strings.EqualFold(server.Region, region) {
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return []models.SurfsharkServer{server}
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}
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}
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return nil
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}
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func (s *surfshark) GetOpenVPNConnections(selection models.ServerSelection) (connections []models.OpenVPNConnection, err error) { //nolint:dupl
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servers := s.filterServers(selection.Region)
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if len(servers) == 0 {
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return nil, fmt.Errorf("no server found for region %q", selection.Region)
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}
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var port uint16
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switch {
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case selection.Protocol == constants.TCP:
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port = 1443
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case selection.Protocol == constants.UDP:
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port = 1194
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default:
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return nil, fmt.Errorf("protocol %q is unknown", selection.Protocol)
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}
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for _, server := range servers {
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for _, IP := range server.IPs {
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if selection.TargetIP != nil {
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if selection.TargetIP.Equal(IP) {
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return []models.OpenVPNConnection{{IP: IP, Port: port, Protocol: selection.Protocol}}, nil
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}
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} else {
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connections = append(connections, models.OpenVPNConnection{IP: IP, Port: port, Protocol: selection.Protocol})
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}
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}
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}
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if selection.TargetIP != nil {
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return nil, fmt.Errorf("target IP %s not found in IP addresses", selection.TargetIP)
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}
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if len(connections) > 64 {
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connections = connections[:64]
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}
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return connections, nil
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}
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func (s *surfshark) BuildConf(connections []models.OpenVPNConnection, verbosity, uid, gid int, root bool, cipher, auth string, extras models.ExtraConfigOptions) (lines []string) { //nolint:dupl
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if len(cipher) == 0 {
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cipher = aes256cbc
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}
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if len(auth) == 0 {
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auth = "SHA512"
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}
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lines = []string{
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"client",
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"dev tun",
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"nobind",
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"persist-key",
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"remote-cert-tls server",
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// Surfshark specific
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"tun-mtu 1500",
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"tun-mtu-extra 32",
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"mssfix 1450",
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"ping 15",
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"ping-restart 60",
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"ping-timer-rem",
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"reneg-sec 0",
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"fast-io",
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"key-direction 1",
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"script-security 2",
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// Added constant values
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"auth-nocache",
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"mute-replay-warnings",
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"pull-filter ignore \"auth-token\"", // prevent auth failed loops
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"auth-retry nointeract",
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"remote-random",
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"suppress-timestamps",
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// Modified variables
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fmt.Sprintf("verb %d", verbosity),
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fmt.Sprintf("auth-user-pass %s", constants.OpenVPNAuthConf),
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fmt.Sprintf("proto %s", connections[0].Protocol),
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fmt.Sprintf("cipher %s", cipher),
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fmt.Sprintf("auth %s", auth),
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}
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if !root {
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lines = append(lines, "user nonrootuser")
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}
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for _, connection := range connections {
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lines = append(lines, fmt.Sprintf("remote %s %d", connection.IP, connection.Port))
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}
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lines = append(lines, []string{
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"<ca>",
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"-----BEGIN CERTIFICATE-----",
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constants.SurfsharkCertificate,
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"-----END CERTIFICATE-----",
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"</ca>",
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}...)
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lines = append(lines, []string{
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"<tls-auth>",
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"-----BEGIN OpenVPN Static key V1-----",
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constants.SurfsharkOpenvpnStaticKeyV1,
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"-----END OpenVPN Static key V1-----",
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"</tls-auth>",
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"",
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}...)
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return lines
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}
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func (s *surfshark) GetPortForward(client network.Client) (port uint16, err error) {
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panic("port forwarding is not supported for surfshark")
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}
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